diff --git a/pin_control/CMakeLists.txt b/pin_control/CMakeLists.txt
new file mode 100644
index 0000000..93a5805
--- /dev/null
+++ b/pin_control/CMakeLists.txt
@@ -0,0 +1,16 @@
+cmake_minimum_required(VERSION 3.20)
+
+project(PinControl)
+find_package(PkgConfig REQUIRED)
+pkg_check_modules(LIBGPIOD REQUIRED libgpiod)
+
+add_library(pin_control SHARED src/pin_control.c)
+
+target_include_directories(pin_control PUBLIC include/ PRIVATE ${LIBGPIOD_INCLUDE_DIRS})
+target_link_libraries(pin_control PUBLIC ${LIBGPIOD_LIBRARIES})
+set_target_properties(pin_control PROPERTIES POSITION_INDEPENDENT_CODE ON)
+
+target_compile_options(pin_control PUBLIC -Wall -Wextra -Werror)
+
+install(TARGETS pin_control LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR})
+install(FILES include/pin_control.h DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})
\ No newline at end of file
diff --git a/pin_control/default.nix b/pin_control/default.nix
new file mode 100644
index 0000000..8c845ff
--- /dev/null
+++ b/pin_control/default.nix
@@ -0,0 +1,10 @@
+{ stdenv, libgpiod, cmake, pkg-config }:
+stdenv.mkDerivation {
+  pname = "pin_control";
+  version = "0.0.1";
+  src = ./.;
+  buildInputs = [ libgpiod ];
+  nativeBuildInputs = [ cmake pkg-config ];
+
+  outputs = [ "out" "dev" ];
+}
diff --git a/pin_control/pin_control.h b/pin_control/include/pin_control.h
similarity index 100%
rename from pin_control/pin_control.h
rename to pin_control/include/pin_control.h
diff --git a/pin_control/readme.md b/pin_control/readme.md
index 5f8c1ca..c8d4cba 100644
--- a/pin_control/readme.md
+++ b/pin_control/readme.md
@@ -1 +1,5 @@
-gcc -o pin_contro_test main.c pin_control.c -lgpiod
\ No newline at end of file
+Compilation command:
+
+```
+
+```
\ No newline at end of file
diff --git a/pin_control/pin_control.c b/pin_control/src/pin_control.c
similarity index 61%
rename from pin_control/pin_control.c
rename to pin_control/src/pin_control.c
index acf604d..aa2b386 100644
--- a/pin_control/pin_control.c
+++ b/pin_control/src/pin_control.c
@@ -1,6 +1,8 @@
 #include <stdio.h>
 #include <gpiod.h>
 
+// https://docs.kernel.org/driver-api/gpio/using-gpio.html
+
 #define GPIO_CHIP "gpiochip0"
 
 struct gpiod_chip *chip;
@@ -47,27 +49,6 @@ int set_pin_state(int pin, int state) {
     return 0;
 }
 
-int read_button(int pin) {
-    // https://libgpiod-dlang.dpldocs.info/gpiod.gpiod_chip_get_line.html
-    struct gpiod_line *line = gpiod_chip_get_line(chip, pin + PIN_OFFSET);
-    if (!line) {
-        printf("Error getting GPIO line");
-        return -1;
-    }
-
-    // https://libgpiod-dlang.dpldocs.info/gpiod.gpiod_line_request_input.html
-    if (gpiod_line_request_input(line, "house-leds") < 0) {
-        printf("Error setting GPIO line direction to input");
-        gpiod_line_release(line);
-        return -1;
-    }
-
-    // https://libgpiod-dlang.dpldocs.info/gpiod.gpiod_line_get_value.html
-    int value = gpiod_line_get_value(line);
-    gpiod_line_release(line);
-    return value; // either 0 or 1
-}
-
 int turn_on_pin(int pin) {
     return set_pin_state(pin, 1);
 }
@@ -92,11 +73,32 @@ int turn_off_all_pins() {
     return 0;
 }
 
-int wait_for_button_press(int button_pin) {
-    while (1) {
-        int button_state = read_button(button_pin); // maybe make it so that this works with a range of pins instead of just one
-        if (button_state == 1) {
-            return button_pin;
-        }
-    }
+int button_presssed(int event, unsigned int pin, const struct timespec * timestamp, void *data) {
+    (void) event;
+    (void) timestamp;
+    * (int *) data = (int) pin;
+    return GPIOD_CTXLESS_EVENT_POLL_RET_STOP;
+}
+
+int wait_for_button_press(unsigned int pins[]) {
+    // https://www.lane-fu.com/linuxmirror/libgpiod/doc/html/group______high__level____.html#ga3ac28eb59bbd31b8b2298f76047d377d
+    
+    int pressed_pin = -1;
+
+    struct timespec ts = {
+        .tv_sec = 3600,
+        .tv_nsec = 0,
+    };
+
+    return gpiod_ctxless_event_monitor_multiple(GPIO_CHIP,
+                                        GPIOD_CTXLESS_EVENT_FALLING_EDGE,
+                                        pins,
+                                        5,
+                                        true,
+                                        "house-leds",
+                                        &ts,     // big timout
+                                        NULL,
+                                        button_presssed,
+                                        &pressed_pin
+                                        );
 }
diff --git a/triviOS/web.nix b/triviOS/web.nix
index 48c33f2..249e6fe 100644
--- a/triviOS/web.nix
+++ b/triviOS/web.nix
@@ -20,7 +20,8 @@
 
     uwsgi = {
       enable = true;
-      group = "nginx";
+
+      user = "nginx";
       plugins = [ "python3" ];
 
       instance = {